Heating furnace



Feb 27, 1923. 1,446,661

E. H. RIESMEYER ET AL HEAT-I'NG FURNACE Filed Sept. 29, 1921 5 sheets-sheet 1 FMGJL,

//V VE/V TOR WITNESSES Feb, 2?, 1923, 1,446,661

' E. H. RIESMEYER ET AL HEATING FURNACE Filed Sept 29, 1921 5 sheets-sheet 5 WITNESSES Patented TFGT'L 2?, 1923*.

entree EDNARD H. EIESMEYEB AND GEORGE H. SCHAFFEE, OF PITTSBURGH, PENNSYLVANIA.

earner HEATING FURNACE.

Application filed September 1 all whom. it may concern:

Be it known that we, EDWARD H. Rins- MEYER and Gnonon H. SCHAFFER, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, citizens of the United States, have invented or discovered certain new and useful Improvements in Heating Furnaces, of which improvements the following is a specification.

The invention described herein relates to certain improvements in hot air furnaces and has for its object a construction permitting of not only the independent use of solid and fluid fuels but also the simul taneous use of such fuels when rendered necessary by extremely cold weather. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Fig. 1 is a sectional elevation of a furnace embodying the improvement claimed herein; Fig. 2 is a sectional plan View, the plane of section being indicated by the line II--II, Fig. 1; Fig. 3 is a sectional elevation on a plane at right angles to Fig. 1; Fig. 4 is a sectional plan view on a plane indicated by the line IV-IV, Fig. 8, and Fig. 5 is a sectional plan view on a plane indicated by the line V- V, Fig. 1.

The portion of the heater in which the solid fuel is burnt, may be constructed in any suitable manner known in the art, the construction shown herein consisting of a fuel pot 1 and fire pot or crab section 2, detachably supported on the fuel pot, and a smoke box or as it is usually termed in the art, the radiator. This radiator consists of a central portion 3 which is an extension of the fire pot, and a tubular annular portion 4 surrounding but spaced from the portion 3 and connected thereto by a radial flue 5. By reference to Figs. '1 and 4.- it will be seen that the nozzle 6 through which gases from the radiator escape to the pipe '7 leading to the chimney, is located diametrically opposite the point of connection of the flue 5 to the an uular radiator. This construction causes a division of the gases, into two streams which are afterwards united as they flow through the nozzle 6.

The fire pot is provided with a box-like extension 8 through which fuel is fed to the furnace. Below the fuel pot is arranged an ash box 9 having a lateral ex- 29, 1921'. Serial No. 504,103.

tension 10 for the removal of ashes, etc., from the box 9. I

Headers 11 formed on arcs of circles which preferably have their centers coincident with the axis of the fuel and fire boxes, are arranged on opposite sides of the fuel box and in approximately horizontal alinement with the lower portions of the fuel box. These headers are connected by a plurality of vertical tubes 12 with similar headers 13 arranged outside of the annular flue 4, or radiator, as shown in Figs. 1, 3 and 4. Burners 14 for fluid fuel are arranged within the lower headers and are adapted to be connected by pipes 15 to a suitable source of supply. These headers are provided with openings 16 to permit access to the burners to light the fluid fuel and for inspection purposes. The upper headers are provided with nozzles 17 for connection with pipes 18 leading to a chimney fine.

A casing 19 is arranged outside of the headers, said casing extending from the base of the furnace to a suitable distance above the heating elements, forming a chamber 20 from which the heated air will escape through pipes 21. Cold air is introduced into the lower portion of the casing through a pipe 22.

y reference to Figs. 1, 2, 3, and 4, it will be seen that the elements heated by the combustion of fluid fuel are spaced a substantial distance from the pot in which solid fuel is burnt and that the annular flue or radiator 4 is so located in the upper portion of the space between the surfaces heated respectively by the two fuels that the air is brought into intimate contact with the surfaces of the annular flue. The spaces between the casing and the elements heated by the fluid fuel is small relative to the inner air chamber so that the flow through the latter will be greater and will cause air flowing up along the casing to pass between and around the tubes connecting the headers.

Where only a relatively small degree of heat is required, only the fluid fuel will be used, but where a higher degree is required, coal will be used, the fluid fuel burners being turned out unless a maximum heat is needed.

It will be observed that separate outlets are provided for the products of the combustion of the two fuels, and in installing the furnace the pipes 7 and 18 should be connected to independent flues in the ehin'l ney as Where the lin'oduetst'i'om Combustion of coal and a fluid fuel are brought together, the larger volume of the coal productswill smother the other flame.

lVe claim herein as-our inventionr' 1. A heating furnaee haying in combination a chamber for the eonibustion of coal headers arranged outside of and spaced a 'suitable'distance apart T rone the walls of said chamber, tubes connecting said he" l'ers, a. bu'l ner 'tor flu d tu el arranged 111 id h ed M depend me ns fe 2. A heating turnaee havlng 1n COIlfllJlnation a chamber for the combustion of coal an annular smoke flue or radiator arranged abo'i e 'sa'id el1ainbei",up'pe1 a nd lower headers arranged outside said chamber, and annular flue respectively, end spaced therefrom, a plurality of tubes eonnectingthe headers; burners for fluid fuel arranged in the lowerheaders and independent outlets 'forpro ducts of eombustion from. the annular flue and the upper headers said outlets e n Q ec esl t ad pen nt fle n t chimney;

testimony whereof, We have hereunto set our hands.

EDWARD 1-1.- BIESMEYER.

enouee I-I." soi-n rrea. 

